Pump energy saving technology introduction: Three element flow impeller energy saving technology

July 26, 2023

Enhancing the energy-saving technology in the pump industry has become an important part of the current national energy conservation work. To improve the operating efficiency of pump products, we must first improve the design efficiency of the pump itself. By strengthening the research on the internal flow of the pump and developing advanced hydraulic design and performance prediction software, we also need to improve the energy-saving operation and management of pump products.
　　
According to national statistics, the power consumption of pump products accounts for about 20% of the country's total generating capacity, accounting for 5% of the country's total fuel consumption. Therefore, to strengthen the pump industry energy-saving technologies, has become an important part of the current national energy conservation. The "Outline of China's Energy Conservation Technology Policy" (2006), jointly promulgated by the Ministry of Science and Technology and the National Development and Reform Commission, clearly states that it is necessary to "develop and popularize highly efficient pump equipment. By improving the ternary flow field of the pump and the two-phase flow analysis and calculation method, Processing technology, the pump energy efficiency reached 83% ~ 87%. "October 28, 2007 the newly revised" People's Republic of China Energy Conservation Law, "proposed that" the state encourages industrial enterprises to adopt efficient and energy-saving motors, boilers, furnaces , Fans, pumps and other equipment. " Several Opinions of the State Council on Revitalizing the Equipment Manufacturing Industry (2006) further clarify several key areas for the revitalization of the equipment manufacturing industry. Large-scale outfits in these key areas involve many key fluid machinery products and key technologies.
　　
To improve the operating efficiency of the pump product, we must first improve the design efficiency of the pump itself, through the strengthening of the internal flow of the pump research and development of advanced hydraulic design and performance prediction software. At the same time, we must also vigorously improve the energy-saving pump operation and management level, because the pump run time if deviate from the design of efficient points, the actual operating efficiency decline will be very significant. Therefore, the use of advanced three-way flow impeller technology, energy-saving recycling pump has a vast space for energy saving, and in line with Sinopec, PetroChina and other pump users energy-saving emission reduction policies.
　　
At present, the three-way flow impeller energy-saving technology, mainly used in the following areas:
　　
(1) large-scale circulating water system
　　
The system is mainly distributed in petrochemical enterprises, large steel mills and other cooling water systems (cooling towers), the system generally use large and medium-sized double suction pump, pump flow, power. For a long time, on the one hand, due to the too conservative selection, the pump head and the flow double deviate from the actual demand of the unit. On the other hand, due to the adjustment of the equipment parameters, the water and pipe network pressure needs to be adjusted, and the difference between winter and summer conditions . From the current assessment of the system point of view, there is a serious deviation from the high-efficiency pumps , low-efficiency operation. In this case, the pump not only high energy consumption, and easily lead to cavitation, causing pump vibration, seriously affecting the stability of the system.
　　
(2) large and medium-sized pumping station construction and renovation project
　　
Pump stations built in the seventies and eighties of the last century, after long-term operation, often found that vanes are damaged by cavitation and have a large blade tip clearance, resulting in low efficiency and high energy consumption. In the last century, axial-flow pumps and diagonal-flow pumps The model is less efficient. Through the construction of national South-North Water Diversion Project, Changsha Water Pump Factory and Jiangsu University insisted on the theory and experimental research of axial flow pump and diagonal flow pump in recent ten years. The effects of series high efficiency axial flow pump (ns = 500-1600) = 350-850), cross-flow pump hydraulic model, two-way pump hydraulic model, the efficiency of similar models than the 80's increased about 5%.
　　
Therefore, combined with the current national water conservancy project construction and energy-saving pump reconstruction project, through the use of efficient axial flow pump (ns = 500-1600), diagonal flow pump (ns = 350-850) and other high-efficiency hydraulic model to optimize pumping station inlet and outlet flow Road device, improve pump station device operating efficiency, can significantly save energy and reduce operating costs.
　　
(3) other high-energy pump system engineering
　　
Pumps as a general machinery, a wide range of applications, for energy-saving pumps, the first consideration to transform high energy consumption, high rate of return pump system. The annual operation of 8400 hours, the energy consumption of more than 200kW / h pump system should be the focus of the transformation of the object, if through the transformation of energy-saving 10%, the annual rate of return is very impressive.